EXCLUSIVE:HBO’s drama pilot The Corrections continues to assemble a stellar cast. In his first regular TV series gig, Ewan McGregor has been tapped to co-star in the Noah Baumbach/Scott Rudin project, joining previously cast Chris Cooper and Dianne Wiest. Based on Jonathan Franzen’s acclaimed book, The Corrections revolves around the troubles of a Midwestern couple (Cooper and Wiest), and their three adult children as they trace their lives from the mid-20th century to “one last Christmas” together near the turn of the millennium. McGregor will play Chip, the middle child, a Marxist academic who lost his tenure-track position over an affair with a student and now works for a Lithuanian crime boss defrauding American investors. Baumbach and Franzen co-wrote the adaptation, with Baumbach set to direct the pilot. The two are executive producing with Rudin. Trainspotting and Star Wars star McGregor, who recently starred in Beginners, will next be seen in Salmon Fishing In The Yemen, Steven Soderbergh’s Haywire and Bryan Singer’s Jack the Giant Killer. UTA-repped McGregor’s only previous series stint was a guest appearance on ER, which earned him an Emmy nomination in 1997.